The '12 cover is fine after being lapped flat on a glass plate, along with the ignition cover. Mine weeped a little stock now no issues. That said, you have to wonder if the oil scavanging vanes on the inside were ever tested since GG was so quick to abandon them. I suspect not and that it was a "shotgun" approach to solving the problem. Honestly they can't hurt, but my older bikes with the alloy covers were just as good. I think its the basket/pressure plate more than anything. Actually they were always good until '11.
